WO2019023903A1 - Method and device for transmitting and processing data packet, and communication device - Google Patents

Abstract

The embodiments of the present invention provide a method and a device for transmitting and processing a data packet, and a communication device. The method comprises: during transmission of a data packet, if it is detected that a basic adjustment processing is performed for a modulation and coding policy of a terminal, calculating a packet error rate level parameter after the basic adjustment processing; comparing the packet error rate level parameter before the basic adjustment processing and the packet error rate level parameter after the basic adjustment processing, so as to obtain packet error rate change information; and if the packet error rate change information satisfies a preset adjustment processing condition, performing an upgrading adjustment processing on the modulation and coding policy on the basis of the modulation and coding policy after the basic adjustment processing. By means of the embodiments of the present invention, the adjustment requirements of an adaptive modulation and coding policy can be better satisfied, improving the quality and rate of data transmission, and improving the throughput when being interfered during communication.

Description

Data packet transmission processing method, device and communication device Technical field

The present invention relates to the field of communications technologies, and in particular, to a data packet transmission processing method, apparatus, and communication device.

Background technique

In recent years, mobile communication technology has achieved rapid development, and people enjoy the convenience brought by mobile communication technology in their lives and work. In industries such as civil aircraft, it is also necessary to transmit necessary information by means of wireless communication, such as transmission control commands, to transmit images captured by an image pickup device mounted on an aircraft.

When data transmission is performed by the mobile communication technology, the data to be transmitted is generally modulated and encoded to obtain one data packet, and after the data packet is sent to the receiving end, the receiving end demodulates and decodes the data packet. And finally get the raw data. In the process of data packet transmission, how to better guarantee the quality and speed of data packet transmission has become a hot issue in research.

Summary of the invention

Embodiments of the present invention provide a data packet transmission processing method, apparatus, and communication device, which can intelligently modulate a modulation and coding strategy.

In a first aspect, an embodiment of the present invention provides a data packet transmission processing method, including:

In the process of data packet transmission, if a basic adjustment process is performed on the modulation and coding strategy of the terminal, the error packet rate level parameter after the basic adjustment process is calculated;

Comparing the packet error rate level parameter before the basic adjustment processing with the packet error rate level parameter after the basic adjustment processing to obtain error packet rate change information;

If the packet error rate change information satisfies the preset adjustment processing condition, the modulation and coding strategy is upgraded and adjusted based on the modulation and coding strategy after the basic adjustment process.

In a second aspect, an embodiment of the present invention provides a data packet transmission processing apparatus, including:

An obtaining module, configured to calculate a packet error rate level parameter after the basic adjustment processing, if a basic adjustment process is performed on the modulation coding strategy of the terminal during the data packet transmission process;

a comparison module, configured to compare a packet error rate level parameter before the basic adjustment processing with a packet error rate level parameter after the basic adjustment processing, to obtain error packet rate change information;

The processing module is configured to perform an upgrade adjustment process on the modulation and coding policy on the basis of the modulation and coding strategy after the basic adjustment processing, if the error rate change information satisfies the preset adjustment processing condition.

In a third aspect, an embodiment of the present invention provides a communications device, including: a processor and a storage device, where:

The storage device is configured to store program instructions;

The processor is configured to invoke a program instruction stored in the storage device, in the process of data packet transmission, if a basic adjustment process is performed on a modulation and coding strategy of the terminal, the calculation is performed after the basic adjustment process a packet error rate level parameter; comparing the packet error rate level parameter before the basic adjustment processing with the packet error rate level parameter after the basic adjustment processing to obtain a packet error rate change information; if the packet error rate change information satisfies Based on the adjustment processing conditions, the modulation and coding strategy is upgraded and adjusted based on the modulation and coding strategy after the basic adjustment processing.

The embodiment of the present invention can perform basic adjustment on the modulation and coding strategy in the process of data packet transmission, and after the adjustment, further evaluate the current adjustment based on the error packet rate level, and further adjust the basis according to the evaluation result. Based on the adjustment of the modulation and coding strategy, the adjustment requirements of the adaptive modulation and coding strategy are better met, the quality and rate of data transmission are improved, and the throughput in the communication process is improved.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic flowchart of a method for processing a data packet according to an embodiment of the present invention;

2 is a schematic flowchart of a method for processing a data packet according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart diagram of another method for processing a data packet according to an embodiment of the present invention; FIG.

4 is a schematic flow chart of a method for performing basic adjustment processing according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a data packet transmission processing apparatus according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.

Detailed ways

In the case where the UAV needs to transmit certain data (such as acquired images) through the communication channel, the data to be transmitted needs to be modulated, encoded, etc., and then transmitted on the wireless communication channel. The modulation and coding techniques employed will determine the quality and rate of data transmission. In an embodiment of the invention, adaptive modulation and coding techniques can be used to modulate and encode the data packets. In the modulation and encoding process, the modulation and bit rate mode of the data packet is changed in real time according to the change of the channel condition. For a scene with good radio channel quality, high-order modulation and high code rate can be used, for example, using 64QAM modulation. Mode, larger block size, higher error correction coding rate, and for scenarios with poor radio channel quality, smaller modulation orders and lower code rates can be used, such as QPSK modulation mode, smaller Data block size, lower error correction coding rate.

In the process of modulating and encoding data packets using adaptive modulation and coding techniques, it is necessary to determine the modulation coding strategy to be used. In one embodiment, the modulation coding strategy may use a combination of modulation mode and error correction code rate. To characterize, as shown in Table 1.

Table 1:

Modulation	Error correction code rate
QPSK	0.12
QPSK	0.59
16QAM	0.37
16QAM	0.6
64QAM	0.45
64QAM	0.75
64QAM	0.93

Wherein, QPSK-0.12 can correspondingly constitute a modulation and coding strategy, and 64QAM-0.75 can constitute a modulation and coding strategy. In an embodiment, for example, 16QAM-0.45 can also constitute a modulation and coding strategy.

In the embodiment of the present invention, determining the modulation and coding strategy may include: determining a modulation and coding strategy based on a Cyclic Redundancy Check (CRC) result feedback of the receiving end. The CRC result feedback may be a transmission feedback message. If the feedback is an acknowledgment ACK message (a message indicating that the packet is correctly received by the receiving end in the communication field), the transmitting end switches to select a higher-order modulation. The coding strategy is to select a more advanced modulation method and error correction code rate, for example, from the current QPSK-0.12 to QPSK-0.59. If the feedback is a NACK message (a message indicating that the packet is not correctly received by the receiving end in the communication field), the transmitting end switches to select a lower coding modulation coding strategy, that is, select a lower-level modulation mode and an error correction code rate. For example, from the current 16QAM-0.6 to 16QAM-0.37. In the embodiment of the present invention, by selecting a suitable modulation and coding strategy, the packet error rate level parameter (BLER) of the communication system can be maintained at a stable level, and the retransmission gain can be obtained by retransmitting the error frame.

FIG. 1 is a schematic flowchart of a method for processing a data packet according to an embodiment of the present invention. The method in the embodiment of the present invention may be performed by a sending end that needs to send a data packet, and may be a dedicated communication device. It can also be performed by a communication device provided on a certain device. For example, when the image is transmitted between the drone and the ground user equipment, the transmission processing method is executed by the communication device provided on the drone.

S101: The transmitting end performs transmission processing on the data based on the modulation and coding strategy of the initial gear position, and sends the data packet, and sets a statistic S(n)=0. In one embodiment, the transmitting end needs to initialize the gear of the modulation and coding strategy and initialize the preset statistic S(n) and the packet error rate level parameter BLER(n) before processing the data.

S102: The transmitting end receives the transmission feedback information, and obtains a feedback amount ACKbit. The CRC check result fed back to the transmitting end by the receiving end through the reverse link. If the receiving end correctly receives the data packet, it will feed back the ACK, and if the data packet is received incorrectly, it will feed back the NACK. If the CRC of the data packet is correct, it indicates that the data packet is correctly received, and if the CRC of the data packet is incorrect, it indicates that the data packet is not correctly received.

In the embodiment of the present invention, the feedback amount is defined:

The feedback amount is defined as: when the nth data packet is received correctly, the feedback amount is 0, and when the nth data packet is received incorrectly, the feedback amount is 1.

S103: The sender updates the statistic S(n). Assuming that the target of the gear adjustment of the modulation and coding strategy is to make the total number of k=ACK/NACK=9, that is, the receiver packet error rate is 10%, then when the ACKbit(n) is received, the statistics are updated:

Among them, when an ACK is received, the statistic S(n)=S(n-1)+1, and when a NACK is received, the statistic S(n)=S(n-1)-k. In a computing embodiment of the invention with respect to statistics, the first adjustment factor is one and the second adjustment factor is k.

S104: Update the packet error rate level parameter BLER(n).

After receiving the ACKbit(n) fed back after transmitting the nth data packet, the error packet rate level parameter is calculated by the following formula:

BLER=α*BLER(n-1)+(1-α)*ACKbit(n) (3);

The feedback amount ACKbit(n) is defined by the above formula (1), and α is a forgetting factor. In one embodiment, the value of α can be 0.98, and the significance of the value is that the weight ratio of the new ACK bit is 1- α.

S105: Determine whether S(n)>T; given a threshold T, and perform basic adjustment processing on the modulation and coding strategy of the transmitting end according to T and S(n). In the embodiment of the present invention, the basic adjustment processing refers to an adjustment process performed based on a size relationship between S(n) and a threshold T (and -T). When S(n)>T, the following S106 is performed. When S(n) < T, the following S107 is performed.

S106: Adjust the gear position of the modulation and coding strategy upwards, that is, perform an upgrade adjustment process.

S107: Determine whether S(n) <-T. When S(n) <-T, S108 described below is executed, and when S(n) is not less than -T, the jump proceeds to S102, and the corresponding processing is continued in the data packet transmission process.

S108: Adjust the gear position of the modulation and coding strategy downwards, that is, perform a degradation adjustment process. In one embodiment, after the gear of the modulation coding strategy is adjusted once, the S(n) is cleared.

Through the adjustment method described in the above steps, it is possible to adjust the modulation and coding strategy more accurately when there is sudden interference in the environment, which can better ensure the quality and speed of transmission and improve the transmission efficiency. Further, in the embodiment of the present invention, when the communication system is subjected to continuous interference of a fixed duty ratio, more NACKs may be received during the period of the continuous interference, for example, when transmitting an image, the aircraft periodically times The ground end transmits a signal including data such as the position of the aircraft, which interferes with the transmission of the image data. In this case, when k is constant, S(n) will always decrease, and the transmitting end needs to continuously reduce the gears of the modulation and coding strategy, but actually lowers the gear of the modulation and coding strategy, and is based on the CRC at the receiving end. Still will be wrong, still will feedback NACK. Therefore, in the embodiment of the present invention, when it is detected that there is signal interference satisfying the condition, that is, the data packet transmission is detected. When there is a fixed duty cycle continuous interference in the process, the packet error rate level parameter of the receiving end may be further estimated based on ACK/NACK signaling at the transmitting end, so as to determine whether to perform modulation according to the packet error rate level parameter. Gear modulation for the coding strategy.

S109: Receive n transmission feedback information to obtain an ACKbit.

The error packet rate level parameter BLER estimated by the formula (3) is recorded before the gear position adjustment of the primary modulation coding strategy is performed based on the above S(n). After the gear position adjustment of the modulation and coding is performed, the update of the M ACK bit is waited for, and an estimated value of the new packet error rate level parameter is obtained as BLER'. M can be equal to 1/(1-α), and α is the forgetting factor mentioned above.

S110: Obtain a packet error rate change information ΔBLER according to the BLER and the BLER′. In an embodiment, the packet error rate change information is a difference between the BLER and the BLER′.

ΔBLER=BLER'—BLER(4);

S111: Whether the packet error rate change information meets a preset adjustment processing condition. In one embodiment, can be provided variation threshold B _th, and a first packet error rate threshold value B _l and the second packet error rate threshold value B _h. If |ΔBLER|<B _th and B _l <BLER'<B _h , the gear of the modulation and coding strategy is actively raised, and a new ΔBLER is calculated according to the above process. The B _th is a threshold for determining the amount of BLER change. In one embodiment, B _th can be 0.02, and B _l and B _h are protection thresholds respectively. In one embodiment, B _l can be 0.1, B. _h can take a value of 0.65. In other embodiments, the B _th , B _l , and B _h may be valued as needed. If the user prefers to use a higher-order modulation and coding strategy to transmit data packets, it is desirable to upgrade the modulation and coding strategy more aggressively. Then, B _{th can} take a larger value, and the data range between B _l and B _h is larger, that is, B _l takes a smaller value and B _h takes a larger value. Conversely, if you want to upgrade the modulation coding strategy is more stable, it will take a smaller value B _th, smaller data between B _l and B _h range.

If the adjustment processing condition is satisfied, the modulation and coding strategy is upgrade-adjusted based on the modulation and coding strategy after the basic adjustment processing, that is, the above S106 is further executed. If the adjustment processing condition is not met, the triggering detection determines whether the modulation adjustment strategy is subjected to the basic adjustment processing, that is, triggering the re-execution of the S102.

In the above manner, it is possible to detect whether the basic adjustment processing of the gear position of a certain modulation and coding strategy affects the BLER. When the above adjustment processing conditions are satisfied, it indicates that the upgrade or degradation of the original modulation and coding strategy does not cause BLER. In order to improve the quality and speed of transmission, the gear of the modulation and coding strategy can be actively increased until the BLER is affected. What contributes to the change in BLER is the uninterrupted data packet, thus removing the interference coded packet to the modulation coding The strategy only adjusts the impact, and the resulting modulation and coding strategy will be more accurate. In addition, the protection range is set, and the active prompt operation of the modulation and coding strategy is not performed outside the protection threshold range.

The embodiment of the present invention can perform basic adjustment on the modulation and coding strategy in the process of data packet transmission, and after the adjustment, further evaluate the current adjustment based on the error packet rate level, and further adjust the basis according to the evaluation result. Based on the adjustment of the modulation and coding strategy, the adjustment requirements of the adaptive modulation and coding strategy are better met, the quality and rate of data transmission are improved, and the throughput in the communication process is improved.

2 is a schematic flowchart of a method for processing a data packet according to an embodiment of the present invention. The method in the embodiment of the present invention may be performed by various communication devices capable of wireless data transmission, or may be performed by a A separate communication device is implemented. Specifically, the method of the embodiment of the present invention includes the following steps.

S201: In the process of data packet transmission, if a basic adjustment process is performed on the modulation and coding strategy of the terminal, the packet error rate level parameter after the basic adjustment process is calculated. In the embodiment of the present invention, the basic adjustment processing mainly refers to an adjustment process regarding a modulation and coding strategy according to transmission feedback information of a data packet. In an embodiment, the basic adjustment processing comprises: performing an upgrade adjustment or a degradation adjustment of the modulation and coding strategy based on the value of the statistic S(n) mentioned in the above embodiment, and S(n) is based on receiving The ACK and NACK are calculated. If S(n) is less than -T, the downgrade adjustment process is performed, and if S(n) is greater than T, the upgrade adjustment process is performed. The value of S(n) is calculated for each data packet transmitted.

S202: Compare the error packet rate level parameter before the basic adjustment processing with the error packet rate level parameter after the basic adjustment processing to obtain error packet rate change information. The error packet rate change information is used to indicate the degree of change of the packet error rate level parameter, and is also to indicate whether the adjustment contributes to reducing the packet error rate and improving the transmission efficiency after performing the basic adjustment process. In an embodiment, the error packet rate change information may be a difference between a packet error rate level parameter before the basic adjustment process and a packet error rate level parameter after the basic adjustment process. The packet error rate change information may be other information indicating a change in the packet error rate level before and after the base adjustment processing.

S203: If the error packet rate change information satisfies the preset adjustment processing condition, the modulation and coding strategy is upgraded and adjusted according to the modulation and coding strategy after the basic adjustment process. In an embodiment, if the value corresponding to the packet error rate change information is smaller than the preset change threshold, the change of the packet error rate before and after the basic adjustment process may be considered to be small, and the adjustment processing condition may be met, and the modulation may be further edited. The code strategy is upgraded and adjusted. If the value corresponding to the error packet change information is greater than the preset change threshold, it is considered that the packet error rate before and after the basic adjustment process is large, and it can be determined whether the basic adjustment process is to be performed once.

In an embodiment, the error rate change information meets the preset adjustment processing condition may further include: the absolute value of the difference is less than a preset change threshold, and the first error rate level parameter is greater than a preset The first packet error rate threshold is less than the preset second packet error rate threshold. That is to say, whether the packet error rate change information satisfies the condition can be determined by B _th , B _l , B _h in the above embodiment, that is, when |ΔBLER|<B _th and B _l <BLER'<B _h , It is determined that the packet error rate change information satisfies the preset adjustment processing condition, and the upgrade process can be performed. On the contrary, it can be judged whether or not a basic adjustment process is to be performed.

The embodiment of the present invention can perform basic adjustment on the modulation and coding strategy in the process of data packet transmission, and after the adjustment, further evaluate the current adjustment based on the error packet rate level, and further adjust the basis according to the evaluation result. Based on the adjustment of the modulation and coding strategy, the adjustment requirements of the adaptive modulation and coding strategy are better met, the quality and rate of data transmission are improved, and the throughput in the communication process is improved.

FIG. 3 is a schematic flowchart of another method for processing a data packet according to an embodiment of the present invention. The method in the embodiment of the present invention may be performed by various communication devices capable of wireless data transmission, or may be performed by A separate communication device is implemented. Specifically, the method of the embodiment of the present invention includes the following steps.

S301: Transmit a data packet. The transmitting end starts processing the data based on the modulation and coding strategy of the initial gear, and transmits the data packet on the wireless communication channel. It is also possible to perform the initialization of S(n), BLER(n) and the like mentioned above for subsequent calculation and judgment.

S302: Acquire transmission feedback information returned by the receiving end of the data packet after transmitting the data packet; in one embodiment, the transmission feedback information may mainly refer to ACK and NACK messages. After the data packet is sent to the receiving end, the receiving end is based on the check result of the CRC check. If it is determined that the data packet is correctly received based on the check result, the ACK message is returned, and if the data packet is not correctly received, the NACK message is returned.

S303: Perform statistics on the obtained transmission feedback information, and perform basic adjustment processing on the current modulation and coding strategy according to the statistical result. In the embodiment of the present invention, the basic adjustment processing refers to an adjustment process on a modulation and coding strategy according to transmission feedback information of a data packet.

In one embodiment, if the value of the statistic is less than the first threshold, the modulation coding strategy is performed. In the degradation adjustment processing in the basic adjustment processing, for example, when S(n) is less than -T, the degradation adjustment processing is performed, that is, the gear position of the modulation and coding strategy is lowered by one step. Of course, according to the degree that S(n) is less than -T, for example, when S(n) is much smaller than -T (the difference between the two is greater than a preset threshold), the modulation coding strategy can be lowered by two steps or Multiple files. In an embodiment, if the value of the statistic is greater than the second threshold, the upgrade adjustment process in the basic adjustment process is performed on the modulation and coding policy. For example, if S(n) is greater than T, the upgrade adjustment process is performed, that is, the modulation coding policy is modulated. The gear is raised by one gear. Similarly, if S(n) is much larger than T (the difference between the two is greater than a preset threshold), the modulation coding strategy can be raised by two or more.

After the basic adjustment processing is performed on the modulation and coding strategy of the terminal, the following steps are continued. In an embodiment, after performing basic adjustment processing on the modulation and coding strategy of the terminal, it is possible to first detect whether there is a signal interference that satisfies the condition in the process of transmitting the data packet, and if there is signal interference that satisfies the condition, the data packet is transmitted. The following step S304 is performed in the course of the process. If there is no signal interference that satisfies the condition, the following steps may not be performed, and the direct jump is performed to perform S302, and it is determined whether the base adjustment processing is performed for the subsequent transmission of the data packet. In one embodiment, the conditional signal interference means that there is a constant duty cycle of persistent interference during packet transmission.

S304: Calculate a packet error rate level parameter after the basic adjustment processing. In one embodiment, the packet error rate level parameter refers to a parameter obtained by performing packet error rate statistics based on the received N pieces of transmission feedback information during a data packet transmission process, where N is at least a positive value of not less than 3. Integer. In one embodiment, the packet error rate level parameter is always calculated during the transmission of the entire data packet, and each time a transmission feedback message (ACK or NACK) is received, a calculation is performed. Specifically, the packet error rate level parameter BLER before the basic adjustment processing is recorded, and the packet error rate level parameter BLER' after the M adjustment packet processing is performed or the M transmission feedback information is received is recorded.

In an embodiment, the error adjustment level parameter after the basic adjustment processing is performed after performing the basic adjustment processing on the modulation and coding strategy of the terminal, and after the terminal receives the M transmission feedback information; The value of M is determined according to the forgetting factor, for example, M may be equal to 1/(1-α).

In an embodiment, the calculation method of the packet error rate level parameter includes: determining a result value corresponding to the currently received transmission feedback information; and determining a packet error rate level parameter, the result value, and a preset according to the last calculation. The forgetting factor calculates the current packet error rate level parameter. For details, refer to the above calculation formula (3). The result value corresponding to the transmission feedback information refers to the feedback mentioned in the above embodiment. The quantity ACKbit(n) has a value of 0 or 1, and the preset forgetting factor refers to the above α.

S305: Compare the error packet rate level parameter before the basic adjustment processing with the error packet rate level parameter after the basic adjustment processing to obtain error packet rate change information. The error packet rate change information is an absolute value of a difference between a packet error rate level parameter before the basic adjustment processing and a packet error rate level parameter after the basic adjustment processing; and the error packet rate change information The calculation method can be obtained by referring to the above formula (4) and taking the absolute value.

S306: Determine whether the packet error rate change information satisfies a preset adjustment processing condition. If the packet error rate change information satisfies the preset adjustment processing condition, the following S307 is performed. If the packet error rate change information does not satisfy the preset adjustment processing condition, the jump proceeds to S302, that is, triggers whether the base adjustment processing is performed on the remodulation coding strategy.

S307: Perform upgrade adjustment processing on the modulation and coding strategy based on the modulation and coding strategy after the basic adjustment processing. The error rate change information meets the preset adjustment processing condition includes: the absolute value of the difference is less than a preset change threshold, and the first packet error rate level parameter is greater than a preset first packet error rate threshold. And less than the preset second packet error rate threshold.

FIG. 4 is a schematic flowchart of a method for performing a basic adjustment process according to an embodiment of the present invention. The method in the embodiment of the present invention corresponds to S303 in the foregoing embodiment. Specifically, the method includes the following steps.

S401: Determine a first adjustment factor and a second adjustment factor. In an embodiment, the second adjustment factor is determined according to a preset receiver error rate requirement value. In an embodiment, the first adjustment factor may be directly set to 1, and the second adjustment factor is a k value, where k is determined according to a preset receiver error rate requirement value, for example, When the user wants the packet error rate to be 10%, the total number of k=ACKs/the total number of NACKs=9 can be set accordingly.

S402: If the currently obtained transmission feedback information indicating that the data packet is correctly received by the receiving end, the first adjustment factor is added to the statistically obtained statistics.

S403: If the currently obtained transmission feedback information indicating that the data packet is not correctly received by the receiving end, the second adjustment factor is subtracted from the statistically obtained statistic.

S404: Perform basic adjustment processing on the current modulation and coding strategy according to the value of the statistic. When the statistic S(n)>T, the gear of the modulation and coding strategy is adjusted upward, that is, the upgrade adjustment process is performed. When the statistic S(n)<-T, the gear of the modulation and coding strategy is adjusted downward, that is, the degradation adjustment process is performed. After the gear of the modulation coding strategy is adjusted once, the S(n) is cleared.

The embodiment of the present invention can perform basic adjustment on the modulation and coding strategy in the process of data packet transmission, and after the adjustment, further evaluate the current adjustment based on the error packet rate level, and further adjust the basis according to the evaluation result. Based on the adjustment of the modulation and coding strategy, the adjustment requirements of the adaptive modulation and coding strategy are better met, the quality and rate of data transmission are improved, and the throughput in the communication process is improved.

A packet transmission processing device and a communication device according to an embodiment of the present invention are described below.

FIG. 5 is a schematic structural diagram of a data packet transmission processing apparatus according to an embodiment of the present invention. The apparatus according to the embodiment of the present invention may be disposed on some devices having a wireless communication function, for example, may be configured to acquire an image. And on the drone that transmits images, it can also be set on a smart terminal such as a smart phone. Specifically, the device of the embodiment of the present invention may include the following structure.

The obtaining module 501 is configured to calculate a packet error rate level parameter after the basic adjustment process, if a basic adjustment process is performed on the modulation and coding strategy of the terminal during the data packet transmission process;

The comparison module 502 is configured to compare the error packet rate level parameter before the basic adjustment process with the error packet rate level parameter after the basic adjustment process, to obtain error packet rate change information;

The processing module 503 is configured to: if the error packet change information meets the preset adjustment processing condition, perform an upgrade adjustment process on the modulation and coding policy based on the modulation and coding strategy after the basic adjustment process.

In one embodiment, the basic adjustment process refers to an adjustment process regarding a modulation and coding strategy according to transmission feedback information of a data packet.

In an embodiment, the obtaining module 501 is further configured to: obtain the transmission feedback information returned by the receiving end of the data packet after transmitting the data packet; and the processing module 503 is further configured to perform the obtained transmission feedback information. Statistics, and based on the statistical results, the current modulation and coding strategy is fundamentally adjusted.

In an embodiment, the processing module 503 is specifically configured to determine a first adjustment factor and a second adjustment factor; if the currently obtained transmission feedback information indicating that the data packet is correctly received by the receiving end, The obtained statistic is added to the first adjustment factor; if the currently obtained transmission feedback information indicating that the data packet is not correctly received by the receiving end, the second adjustment factor is subtracted from the statistically obtained statistic; The current modulation and coding strategy is fundamentally adjusted according to the value of the statistic.

In an embodiment, the second adjustment factor is determined according to a preset received packet error rate requirement value. Fixed.

In an embodiment, the processing module 503 is specifically configured to perform a degradation adjustment process in the basic adjustment process on the modulation and coding policy if the value of the statistic is less than the first threshold.

In an embodiment, the processing module 503 is specifically configured to perform an upgrade adjustment process in a basic adjustment process on the modulation and coding policy if the value of the statistic is greater than the second threshold.

In one embodiment, the packet error rate level parameter refers to a parameter obtained by performing packet error rate statistics based on the received N pieces of transmission feedback information during a data packet transmission process, where N is at least a positive value of not less than 3. Integer.

In an embodiment, the calculation method of the error rate level parameter includes: determining a result value corresponding to the currently received transmission feedback information; and determining a packet error rate level parameter, the result value, and a preset according to the last calculation. The forgetting factor is calculated to obtain the current packet error rate level parameter.

In an embodiment, the error adjustment rate level parameter after the basic adjustment processing refers to: after the base adjustment processing is performed on the modulation and coding strategy of the terminal, and after the terminal receives the M transmission feedback information, the calculation is performed. The value of M is determined according to the forgetting factor.

In one embodiment, the error packet rate change information is an absolute value of a difference between a packet error rate level parameter before the basic adjustment process and a packet error rate level parameter after the base adjustment process; The error rate change information meets the preset adjustment processing condition includes: the absolute value of the difference is less than a preset change threshold, and the first packet error rate level parameter is greater than a preset first packet error rate threshold and is less than The preset second packet error rate threshold.

In an embodiment, the processing module 503 is further configured to: if the packet error rate change information does not meet the preset adjustment processing condition, trigger whether to perform a base adjustment process on the modulation and coding policy.

In an embodiment, the apparatus may further include: a detecting module 504, configured to detect, in the process of transmitting the data packet, whether there is signal interference that satisfies the condition; if yes, notify the acquiring module to perform the calculating on a basis Adjust the processed packet error rate level parameter.

In one embodiment, the conditional signal interference means that there is a constant duty cycle of persistent interference during packet transmission.

The embodiment of the present invention can perform basic adjustment on the modulation and coding strategy in the process of data packet transmission, and after the adjustment, further evaluate the current adjustment based on the error packet rate level, and further adjust the basis according to the evaluation result. Based on the adjustment of the modulation and coding strategy, the adjustment requirements of the adaptive modulation and coding strategy are better satisfied, the quality and rate of data transmission are improved, and the communication process is improved. Throughput when subjected to interference.

FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention. The communication device includes a power supply module, a shell, and the like, and may further include a storage device 601 and a processor 602. In one embodiment, the communication device may be a dedicated communication processing device, and the communication device may include a communication interface 603 through which data of other devices to be transmitted is received by the processor. After the corresponding processing is performed by the 602, the corresponding data packet is sent by the communication interface 603 to the receiving end. In one embodiment, the communication device is a multi-function device, and the communication device itself has data to be transmitted, and the communication device includes a communication interface 603. After the data to be transmitted is processed by the processor 602, The corresponding data packet is sent to the receiving end by the communication interface 603. For example, the communication device may be a device such as a smart phone or an aircraft such as an aircraft that needs to transmit an image.

The storage device 601 may include a volatile memory, such as a random-access memory (RAM); the storage device 601 may also include a non-volatile memory, such as a fast A flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); the storage device 601 may further include a combination of the above types of memories.

The processor 602 can be a central processing unit (CPU). Further, the processor 602 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

Optionally, the storage device 601 is further configured to store program instructions. The processor 602 can invoke the program instructions to implement a method corresponding to the embodiments of Figures 1, 2, 3, and 4 of the present application.

Specifically, the processor 602 is configured to invoke a program instruction stored in the storage device 601, in the process of data packet transmission, if a basic adjustment process is performed on a modulation and coding policy of the terminal, a packet error rate level parameter after the base adjustment processing; comparing the packet error rate level parameter before the basic adjustment processing with the packet error rate level parameter after the basic adjustment processing, to obtain a packet error Rate change information; if the packet error rate change information satisfies the preset adjustment processing condition, the modulation and coding strategy is upgraded and adjusted based on the modulation and coding strategy after the base adjustment process.

In one embodiment, the basic adjustment process refers to an adjustment process regarding a modulation and coding strategy according to transmission feedback information of a data packet.

In an embodiment, the processor 602 is further configured to: obtain transmission feedback information returned by the receiving end of the data packet after transmitting the data packet; perform statistics on the obtained transmission feedback information, and use the statistical result to compare the current The modulation coding strategy performs basic adjustment processing.

In an embodiment, the processor 602 is configured to determine a first adjustment factor and a second adjustment factor. If the currently obtained transmission feedback information indicating that the data packet is correctly received by the receiving end, the statistics are obtained. The statistic is added to the first adjustment factor; if the currently obtained transmission feedback information indicating that the data packet is not correctly received by the receiving end, the second adjustment factor is subtracted from the statistically obtained statistic; The value of the statistic is used to perform basic adjustment processing on the current modulation and coding strategy.

In an embodiment, the second adjustment factor is determined according to a preset receiver error rate requirement value.

In an embodiment, the processor 602 is configured to perform a degradation adjustment process in the basic adjustment process on the modulation and coding policy if the value of the statistic is less than the first threshold.

In an embodiment, the processor 602 is configured to perform an upgrade adjustment process in a basic adjustment process on the modulation and coding policy if the value of the statistic is greater than the second threshold.

In one embodiment, the packet error rate level parameter refers to a parameter obtained by performing packet error rate statistics based on the received N pieces of transmission feedback information during a data packet transmission process, where N is at least a positive value of not less than 3. Integer.

In an embodiment, the processor 602 is configured to determine a result value corresponding to the currently received transmission feedback information; the error packet rate level parameter obtained according to the last calculation, the result value, and a preset forgetting factor. Calculate the current packet error rate level parameter.

In an embodiment, the error adjustment rate level parameter after the basic adjustment processing refers to: after the base adjustment processing is performed on the modulation and coding strategy of the terminal, and after the terminal receives the M transmission feedback information, the calculation is performed. The value of M is determined according to the forgetting factor.

In one embodiment, the error packet rate change information is an absolute value of a difference between a packet error rate level parameter before the basic adjustment process and a packet error rate level parameter after the base adjustment process; The error rate change information satisfies the preset adjustment processing condition, including: the absolute value of the difference is less than a preset change The threshold value is greater than the preset first packet error rate threshold and less than the preset second packet error rate threshold.

In an embodiment, the processor 602 is further configured to: if the packet error rate change information does not meet the preset adjustment processing condition, trigger a detection whether to perform a base adjustment process on the modulation and coding policy.

In an embodiment, the processor 602 is further configured to: during the process of transmitting the data packet, detect whether there is signal interference that satisfies the condition; if yes, trigger the execution of the error rate level after the basic adjustment process parameter.

In one embodiment, the conditional signal interference means that there is a constant duty cycle of persistent interference during packet transmission.

The embodiment of the present invention can perform basic adjustment on the modulation and coding strategy in the process of data packet transmission, and after the adjustment, further evaluate the current adjustment based on the error packet rate level, and further adjust the basis according to the evaluation result. Based on the adjustment of the modulation and coding strategy, the adjustment requirements of the adaptive modulation and coding strategy are better met, the quality and rate of data transmission are improved, and the throughput in the communication process is improved.

The above disclosure is only a part of the embodiments of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims (30)

1. A method for processing a data packet, which is characterized by comprising:

   In the process of data packet transmission, if a basic adjustment process is performed on the modulation and coding strategy of the terminal, the error packet rate level parameter after the basic adjustment process is calculated;

   Comparing the packet error rate level parameter before the basic adjustment processing with the packet error rate level parameter after the basic adjustment processing to obtain error packet rate change information;

   If the packet error rate change information satisfies the preset adjustment processing condition, the modulation and coding strategy is upgraded and adjusted based on the modulation and coding strategy after the basic adjustment process.
2. The method according to claim 1, wherein said basic adjustment processing refers to an adjustment processing on a modulation and coding strategy based on transmission feedback information of the data packet.
3. The method of claim 1 or 2, further comprising:

   Obtaining transmission feedback information returned by the receiving end of the data packet after transmitting the data packet;

   The obtained transmission feedback information is counted, and the current modulation and coding strategy is basically adjusted according to the statistical result.
4. The method according to claim 3, wherein the statistic is performed on the obtained transmission feedback information, and the current modulation and coding strategy is subjected to basic adjustment processing according to the statistical result, including:

   Determining a first adjustment factor and a second adjustment factor;

   If the currently obtained transmission feedback information indicating that the data packet is correctly received by the receiving end, the first adjustment factor is added to the statistically obtained statistics;

   If the currently obtained transmission feedback information indicating that the data packet is not correctly received by the receiving end, the second adjustment factor is subtracted from the statistically obtained statistic;

   The current modulation and coding strategy is fundamentally adjusted according to the value of the statistic.
5. The method according to claim 4, wherein the second adjustment factor is determined according to a preset receiving end packet error rate requirement value.
6. The method according to claim 4, wherein the performing a basic adjustment process on the current modulation and coding strategy according to the value of the statistic includes:

   If the value of the statistic is smaller than the first threshold, the demodulation adjustment processing in the basic adjustment processing is performed on the modulation and coding strategy.
7. The method according to claim 4, wherein the performing a basic adjustment process on the current modulation and coding strategy according to the value of the statistic includes:

   If the value of the statistic is greater than the second threshold, the upgrade adjustment process in the basic adjustment process is performed on the modulation and coding strategy.
8. The method according to any one of claims 1 to 7, wherein the packet error rate level parameter is obtained by performing packet error rate statistics based on the received N pieces of transmission feedback information during data packet transmission. a parameter; wherein N is a positive integer not less than 3.
9. The method according to claim 8, wherein the calculation of the error rate level parameter comprises:

   Determining a result value corresponding to the currently received transmission feedback information;

   The current packet error rate level parameter is calculated according to the previous packet error rate level parameter, the result value, and the preset forgetting factor.
10. The method according to claim 9, wherein the error adjustment rate level parameter after the basic adjustment processing refers to: after performing the basic adjustment processing on the modulation and coding strategy of the terminal, and receiving M at the terminal The error packet rate level parameter calculated after transmitting the feedback information; the value of the M is determined according to the forgetting factor.
11. The method according to any one of claims 1 to 10, wherein the error packet rate change information is a packet error rate level parameter before the basic adjustment processing and a packet error rate level after the basic adjustment processing The absolute value of the difference between the parameters;

    The error rate change information meets the preset adjustment processing condition includes: the absolute value of the difference is less than a preset change threshold, and the first packet error rate level parameter is greater than a preset first packet error rate threshold. And Less than the preset second packet error rate threshold.
12. The method of any of claims 1-11, further comprising:

    If the packet error rate change information does not satisfy the preset adjustment processing condition, triggering whether the base adjustment processing is performed on the modulation and coding strategy is triggered.
13. The method according to any one of claims 1 to 12, wherein the calculating, before the base adjustment processing, the error rate level parameter further comprises:

    During the transmission of the data packet, it is detected whether there is signal interference that satisfies the condition;

    If yes, the calculation of the error packet rate level parameter after the basic adjustment process is performed.
14. The method of claim 13 wherein said conditionally compliant signal interference means that there is a constant duty cycle of persistent interference during packet transmission.
15. A transmission processing device for a data packet, comprising:

    An obtaining module, configured to calculate a packet error rate level parameter after the basic adjustment processing, if a basic adjustment process is performed on the modulation coding strategy of the terminal during the data packet transmission process;

    a comparison module, configured to compare a packet error rate level parameter before the basic adjustment processing with a packet error rate level parameter after the basic adjustment processing, to obtain error packet rate change information;

    The processing module is configured to perform an upgrade adjustment process on the modulation and coding policy on the basis of the modulation and coding strategy after the basic adjustment processing, if the error rate change information satisfies the preset adjustment processing condition.
16. A communication device, comprising: a processor and a storage device, wherein:

    The storage device is configured to store program instructions;

    The processor is configured to invoke a program instruction stored in the storage device, in the process of data packet transmission, if a basic adjustment process is performed on a modulation and coding strategy of the terminal, the calculation is performed after the basic adjustment process a packet error rate level parameter; comparing the packet error rate level parameter before the basic adjustment processing with the packet error rate level parameter after the basic adjustment processing to obtain a packet error rate change information; if the packet error rate change information satisfies Based on the adjustment processing conditions, the modulation and coding strategy is upgraded and adjusted based on the modulation and coding strategy after the basic adjustment processing.
17. The communication device according to claim 16, wherein said basic adjustment processing refers to an adjustment processing on a modulation and coding strategy based on transmission feedback information of the data packet.
18. A communication device according to claim 16 or 17, wherein

    The processor is further configured to: obtain transmission feedback information returned by the receiving end of the data packet after transmitting the data packet; perform statistics on the obtained transmission feedback information, and perform basic adjustment processing on the current modulation and coding strategy according to the statistical result. .
19. A communication device according to claim 18, wherein

    The processor is configured to determine a first adjustment factor and a second adjustment factor; if the currently obtained transmission feedback information indicating that the data packet is correctly received by the receiving end, adding the statistics to the statistics obtained a first adjustment factor; if the currently obtained transmission feedback information indicating that the data packet is not correctly received by the receiving end, subtracting the second adjustment factor from the statistically obtained statistic; The modulation coding strategy performs basic adjustment processing.
20. The communication device according to claim 19, wherein said second adjustment factor is determined according to a preset reception error rate demand value.
21. A communication device according to claim 19, wherein

    The processor is configured to perform a degradation adjustment process in the basic adjustment process on the modulation and coding policy if the value of the statistic is less than the first threshold.
22. A communication device according to claim 19, wherein

    The processor is configured to perform an upgrade adjustment process in a basic adjustment process on the modulation and coding policy if the value of the statistic is greater than the second threshold.
23. The communication device according to any one of claims 16 to 22, wherein the packet error rate level parameter is obtained by performing packet error rate statistics based on the received N pieces of transmission feedback information during data packet transmission. The parameter; wherein N is at least a positive integer not less than 3.
24. A communication device according to claim 23, wherein

    The processor is configured to determine a result value corresponding to the currently received transmission feedback information; and calculate the current packet error according to the previously calculated error packet rate level parameter, the result value, and a preset forgetting factor. Rate level parameter.
25. The communication device according to claim 24, wherein the packet error rate level parameter after the basic adjustment processing refers to: after performing the basic adjustment processing on the modulation and coding strategy of the terminal, and receiving the M at the terminal Calculated after transmitting feedback information; the value of M is determined according to the forgetting factor.
26. The communication device according to any one of claims 16 to 25, wherein the error packet rate change information is a packet error rate level parameter before the basic adjustment processing and a packet error rate after the basic adjustment processing The absolute value of the difference between the horizontal parameters;

    The error rate change information meets the preset adjustment processing condition includes: the absolute value of the difference is less than a preset change threshold, and the first packet error rate level parameter is greater than a preset first packet error rate threshold. And less than the preset second packet error rate threshold.
27. A communication device according to any of claims 16-26, characterized in that

    The processor is further configured to: if the packet error rate change information does not meet the preset adjustment processing condition, trigger whether to perform a basic adjustment process on the modulation and coding policy.
28. A communication device according to any of claims 16-27, characterized in that

    The processor is further configured to detect, in the process of transmitting the data packet, whether there is signal interference that satisfies the condition; if yes, perform the calculation of the error packet rate level parameter after the basic adjustment process.
29. The communication device according to claim 28, wherein said conditional signal interference means that there is a constant duty cycle of continuous interference during data packet transmission.
30. A computer storage medium characterized by storing a program in the computer storage medium An instruction for transmitting a data packet processing method according to any one of claims 1 to 14 when the program instruction is executed by a processor.

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